Function: 1. The proportional injection device is installed in the water supply pipe and you can get power without electric drive water pressure. 2. Equipped with a vent valve, the scale is accurate and clear, the dosage is adjustable and easy to use. 3. The pump piston and crank are driven by the flowing pressure water and the liquid additive is inhaled and dissolved directly into water. 4. The device moves up and down in a cylinder to expel water, and additives from the bottom container are continuously added to the flowing water. 5. Suitable for sewage irrigation, equipment maintenance, gardening, livestock breeding, water treatment, food processing, printing industry, etc. Specification: Item Type: Fertilizer Injector Material: PVC. Weight: approx. 1924 g / 67.9 ounces. Product size: approx. 50 x 17 cm / 19.7 x 6.7 inches. Length of the bottom black bar: approx. 20 cm / 7.9 inches. External diameter of additive inlet pipe: approx. 12 mm / 0.5 inches. Water Inlet and Outlet Thread: G3 / 4 in. Ratio range: 0.4% -4% Flow range: 20L / H-2500L / H Working water pressure: 0.2-6 kg. Continuous operation: > 100T Working temperature: 5-40°C. Uses: agricultural irrigation, equipment maintenance, flower gardening, animal breeding, environmental protection, water treatment, industrial disinfection, foam for car washing, food processing, industrial hygiene, printing and other industries that require constant dilution of proportion. Package List: 1 x Fertilizer Injector a>